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The horizontal rows on the Periodic Table are called periods.

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11y ago
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9y ago

There are seven horizontal rows in the periodic table of elements. These horizontal rows are called periods. The vertical rows are called groups.

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8y ago

A row is horizontal. A column is vertical.

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12y ago

Rows are vertical and columns are horizontal.

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9y ago

There are 7 horizontal rows. There are 18 vertical columns.

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9y ago

A row is usually considered horizontal

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Q: How many horizontal rows are there?
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